公开(公告)号：US20190304303A1

公开(公告)日：2019-10-03

申请号：US16442728

申请日：2019-06-17

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Jeffrey D. Janovec ,  Kenneth L. Smith ,  Michael R. Duoos ,  Todd A. Ballen ,  Travis L. Potts ,  James Howard ,  Thomas J. Dahlin

IPC: G08G1/0962 ,  G06K9/00 ,  G08G1/0967 ,  G08G1/095

Abstract: Disclosed is an identification system to improve safety on roads and allow for the driver or for the vehicle itself, if it is autonomous or semi-autonomous, to have readable and useful information about road signs, roadways, and adjacent roadway information. The disclosed identification system comprises a marker with marker communication information that can be read by a vehicle information system to provide information to the vehicle. Information that the marker communication information may convey would allow the vehicle information system to detect or recognize, or both detect and recognize critical road sign, roadway information, and adjacent roadway information. Then, the vehicle information system could respond to the information received from the marker communication information.

公开(公告)号：US20190137669A1

公开(公告)日：2019-05-09

申请号：US16095406

申请日：2017-05-30

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： John A. Wheatley ,  Gilles J. Benoit ,  Todd A. Ballen ,  Kenneth L. Smith ,  Guanglei Du ,  Edward J. Kivel ,  Rolf W. Biernath ,  Jordan D. Whitney ,  Daniel J. Schmidt

IPC: G02B5/20 ,  G02B27/28 ,  G02B5/26 ,  G02B5/30

Abstract: An optical filter including a polarizer and a visible light blocking filter is described. The polarizer is configured to transmit at least 60 percent of light in a first infrared wavelength range that is incident on the polarizer at normal incidence in a first polarization state, to transmit less than 30 percent of light in a second infrared wavelength that is incident on the polarizer at normal incidence in a second polarization state orthogonal to the first polarization state, and to transmit less than 30 percent of light in a third infrared wavelength range that is incident on the polarizer with a 50 degree angle of incidence in the second polarization state. The visible light blocking filter configured to transmit at least 60 percent of light in the first infrared wavelength range at normal incidence in the first polarization state.